Self-threading shuttle



sepa 18, 1928. 1,684,780

` lc.. RICARD v SELF THREADING SHUTTLE Filed Oct. 4, 1926 'a thread loopvention, 5

UNITI-:n.srArEs -1-684780 'r1-:Nr ori-ica -OHBIsrY arcani); or.woonsocxnr, RHODE IsLArm.

snm-mmm@ SHUTTLE Application mea omnia, ma serial No: 189,858.-

This invention relates to an improved selfthreading shuttle for loomsand more particularly to a shuttle of this character having means forpositively preventing the removal of the thread from either end of thethread passage when the shuttle is in use. While various means have beenemployed heretofore in thel construction of self-threading shuttles forpreventing the removal of the thread from the thread passage none ofthese devices since a loose bobbin may overrun to produce at the bobbinend of the thread passage or the thread may be caused to loop at the tipend ofthe passage as the bobbin contacts with the thread may be thrownfrom the passage at either end thereof. In the previous constructions ofthis character only one positive thread lock has been provided thus in"all from one end of the passage where it may be caught upon someprojecting part and broken by further movement of the bobbin. or evendetached from the single locking means employed. Y j

It is the object of the present invention to provide ashuttle of thischaracter which will permit self-threading and positivelylock'the threadagainst removal from the thread re ceiving passage. In theaccomplishment of this object a positive thread locking means isprovided at each end of the thread passa e thus preventing the removalof the thread from any portion of the. operation of the shuttle.`

Other objects and advantages of the invention relate to variousstructural details and modes of operation as forth inthe detaileddescription tofollow.

Referring to the drawings:

Fig. l perspective view of a self- 1s a threading shuttle embodying thepresent `in- Fig. 2 is across sectional view taken along Y the line 2-2of Fig. 1" and showing the construction of the thread locking meanslocated at the bobbin end ofthe thread receiving passageyand, l n 'tFig. 8 is a perspective .view of the thread block showing the threadpassage and' the thread locking means located adjacent to the shuttletip.

The shuttle body l is of the usual constru`ction and has a bobbinchamber 2 in which the bobbin 3 carrying the thread tais detachably hasproved entirely successful,

picker stick whereby the.

vpassed thereover and the Ily retained in the passage curved tip llofthe thread bloc-lr 6 which;

passage during the v will be Amore fully-set sary.

supported, as is usualn devices of this charac er.

Forwardly of thebobbin shuttle is provided with a assage 5 which extendsthrough aA threa lock 6, preferably of metal, the thread r servingpassage communicatin with a side delivery eye 7 through whic the thread'passes in the reciprocating movement of the shuttle;

The thread receiving passage 5 of the block 6 may be substantiallystraight to yfacilitate drawing the thread into the passage on thechamber 2 the first pick of the shuttle after replenislnnent.`

AA curved thread lock 8 has one end therethread receivingv ofsecured inthe'block upon one side of the. i

passage 5 adjacent to the bobbin end of the passage, the thread lock 8being formed of thin exible material extending across the ee endl lieswithin the groove 10 formed in the wall of the passage. Y

is vconstruction readily permits the thread to be i 8 whereupon 'theHexible character of the lock causes the free e d thereof to snap backinto the groove a r the. thread has thread is positiveat this point. The

serves as a thread director to direct the the shuttle after suitableshape, across-the case it termlnates short of the passage since thethread lock cooperating therewith renders rther extension of the curvedtip unnecesg i thread into the passage 5 on the first pick ofreplenishment may be of any and may or may not entend A'thin 'flexiblemember l2 has one end secured to the thread block 6 on the opposite sideof the passage from the thread directing tip 'l1 and extends downwardlyacross the passage 5, the Ifree end of said flexible member contactingwith a portion of the thread directing member l1 to readily permit thethread to be drawn downwardly over the thread directing member 1l intothe passage 5 but positivelyfpreventing removal of the thread from thepassage.-

It will' be understood that on the return movement of the shuttle afterreplenishment the thread will pass through the side delivery eye 7adjacent the groove 14 for delivery.

It will be understood that the construction passage and curvingdownwardly so that the cases permitting the Vthread to be thrown frpassage 5, although inl the present shown herein readil permits thethreadto bedrawn into the t' read receiving passage onthe'irst pickafter replenishment and positivel retains'the thread in the passage pre--`l venting it from being thrownout both at the bobbin end and at thetip end after the thread haspassed the free ends bf the thread locks 8and 12. Thus .breaking of the thread by reason of its escaping from thethread re- 10 ceiving passage and looping and catching on obstructionsin positively prevented. While the thread block shown is formed with asubstantially straight passage 5` and with the thread directing portionor tip terminat- 15 ing short of the l'passage 5 to facilitatethreading, the present improvement may be readily applied to 'and usedwith types ofthread blocks. What I -claim is:o 20

block havin a llongitudinal thread receiving passage, an positive'locking means located at opposite ends of said block to prevent the.

rernoval'ot the thread from saidpassage.

2. In a seit-threading shuttle having a side delivery eye and a passagerigid thread director positionedV 1 side 0i said passage, and a yieldin'tending downwardly7l from the bo y of the I0 shuttle diagonally acrossthe passage and into contact with the thread director to normally closethe passage 'and prevent removal ofthe thread from the passage.

' 3. In av'selfhreading block provided with a vpassage open at the topfor the insertion of the thread,`a

cated `Within and extendingngentirelyl across A the effective Width ofthe vpassage .in said 'block 0 adjacent to one end 'of said passage,

upon one any of the usual"V 'of said passage,

1. In a self-threading shuttle, a threading for the thread, a

-lexible curved thread lockv loceither end of said passage.

resilient member extending across said passage opposite end of saidpassage for preventing removal of the thread from said passage.'

i 4. In a self-threading shuttle, a threading block provided with alongitudinal thread receiving .passage and having a groove formed in thewall of the passage adjacent to one end adjacent to the of said block, acurved thread lock havingv one end secured to the block and the oppositeend positioned in said groove, and a flexible thread lock at theopposite end of said thread :receiving passage.

5. In a self-threading shuttle, a. threading block provided with alongitudinal thread receiving passage and having a rigid threaddirecting portion located adjacent to one Side carri/edby said blocl:land:

and a flexible thread lock I secured to said block upon the oppositeside y of said passage and extending downwardly L` and into contact withthe portion' of said block.v (i. Ina selfhreading shuttle, blockprovided with a .longitudinal thread receiving passage and having agroove formed in the wall of the passage adjacent to one end threaddirecting a threading of said block, and a-curved thread lock ezr-`tending across the passage having one end seciired to the block and t eopposite end positioned in the groove to ositlvely prevent the removalof the threadrom the passage.

7 In a self-threading block having a lon passage, and iiexi le lockingmembers lo.- cated at opposite endsof said lpassage for osishuttle, athreading itudinal thread' receiving 'tivelypreventingremovalof thethread rom In testimony whereof` I have' aixed my signature..

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